Tool for truing, cleansing, and grinding valves and valve-seats.



A. A. BULL. TOOL FOR TRUING, CLEANSING, AND GRINDING VALVES AND VALVE SEATS. APPLICATION FILED APR. 3. 1915.

1,170,045. Patented Feb. 1, 1916.

3 SHEETS-SHEET 1.

Fly. 2.

WITNESSES; 654;

\NVENTOR THE COLUMBIA PLANDGRAPH :0., WASHINGTON, D c

A. A. BULL.

TOOL FOR TRUING, CLEANSING, AND GRINDING VALVES AND VALVE SEATS.

APPLICATION FILED APR. 3. I9I5.

Patented Feb 1,

3 SHEETSSHEET INVENTOR WITNESSES.

afa. M

A. A. BULL. TOOL FOR TRUING, CLEANSING, AND GRINDING VALVES AND VALVE SEATS. I

APPLICATION FILED APR.3. I915.

1,170,045. I Patented Feb. 1, 1916.

3 SHEETS-SHEET 3.

WITNESSES: INVENTOR UNITED STATES PATET QFTCE.

ARTHUR ALBERT BULL, OF DETROIT, MICHIGAN.

TOOL FOR TRUING, CLEANSING, AND GRINDING VALVES AND VALVE-SEATS.

Application filed April 3, 1915.

To all whom it may concern:

Be it known that I, ARTHUR ALBERT BULL, a citizen of the United States, residing at Detroit, in the county of Wayne and State of Michigan, have invented new and useful Improvements in Tools for Truing, Cleansing, and Grinding Valves and Valve-Seats, of which the following is a specification.

My invention relates to a tool for truing, cleansing and grinding valves and valve seats of puppet valves of the type commonly employed in the cylinders of internal combustion engines.

The primary object of the invention is to provide a tool for truing, cleaning and grinding ofi' working faces of valves and valve seats, so as to remove the carbon deposits on such surfaces, to correct inaccuracies of the valve and seat consequent upon the warping or distortion of the surfaces under the heat of the engine, and to obliterate pits and other depressions or irregularities so as to secure a perfect fit between the valve and valve seat.

A further object of the invention is to provide a tool by which the operations of grinding or cutting the valve and its seat may be simultaneously performed by means of one and the same tool, without alteration of the tool, and in such a manner as to out the valve face and its seat to exactly the same degree of taper.

A further object is to provide a tool embodying means for pilotingor centering it with respect to the valve and its seat by the employment of means adapted to utilize the valve stem itself as the centering agent, so as to insure perfect coordination in the relationship of the parts of the tool and their respective actions on the surfaces to be cut or ground.

A still further object of the invention is .to provide a tool by means of which the valve and its seat may be independently cut or trued.

A still further object of the invention is to provide a tool which is adapted for use in connection with valves of different sizes and different angularities of the valve faces and seats, and which further embodies means for centering the tool upon valve stems of different diameters, and for operating the tool in a simple, reliable and effective manner.

The invention consists of the features of Specification of Letters Patent.

Patented Feb. 1 1916. Serial No. 19,082. 7

construction, combination and arrangement of parts herein fully described and claimed, reference being had to the accompanying drawings in which Figure l is a side elevation, partly in longitudinal section, of one form of tool embodying my invention. Fig. 2 is a side view of the outer end of the body of the tool. Fig. 3 is an end elevation of the same. Fig. l is a detail view of one of the ball retainers. Fig. 5 is a view similar to Fig. l of a modified form of tool. Fig. 6 is a transverse section on the line 66 of Fig. 5. Fig. 7 is a view similar to Figs. 1 and 5 of still another form of tool. Fig. 8 is a view similar to Fig. 2 of the outer end of the body of the tool shown in Fig. 7. Fig. 9 is a side elevation of the driving device shown detached from thetool body. Fig. 10 is a plan view of the same.

Referring to Figs. 1 to 4 inclusive, 1 designates the body of the tool, which is formed of a tube or cylinder provided at its outer end with a flange or enlargement 2 provided in its outer face with an annular series of grooves to receive detachable cutters 3. The head or enlargement 2 is formed with a recess or chamber 4 communicating with the bore or passage 5 of the body 1, and into the outer portion of which the ed es of the cutters 3 project. The cutters 3 are removably mounted in their receiving grooves or slots 6, and may be adjusted therein with relation to the axis of the head, and said cutters have beveled cutting edges corresponding to the taper or slope of the seat face of the valve on which they are designed to operate. The opposite end of the body 1 is formed with an externally and internally threaded and tapered flange or projection 7 which is adapted to extend into and support an internally threaded annular cutter 8 having a beveled or tapered face provided with cutters 9, which cutters are designed to act upon the beveled or tapered surface of the valve seat. The two sets of cutters have the same pitch or degree of angularity with respect to the axis of the head so as to insure a proper cutting or truing of the surfaces of the valve and its seat to adapt one to perfectlv fit the other.

In practice, the cylindrical body 1 is fitted upon the stem 10 of the valve 11, so as to be piloted or guided with respect to the valve and its seat 12, the valve proper being dis posed within the chamber 4; so that its working surtace'may be engaged by the cutseat, so'that each may be truly cut, and their surfaces also cut at a proper angle, each with relation to the other, 1 provide within the body 1 supporting and centering means which may be made adjustable to suit different conditions. This supporting and centering means consists, as shown, of a bushing or centering cone 18 and a bushing or adjusting cone 14, the former being suitably held in position within the bore 5, while the latter is externally threaded and adjustably engages the internal threads at the inner end of said bore, whereby the opposing faces of the bushings or cones may be adjusted with relation to each other. These opposing faces of the bushings or cores are beveled so as to converge in an outward direction, and between such faces of the cones are disposed supporting and centering balls ,orobjects 15 held imposition by cage or retaining spring 16 and adapted when the cone 14 is moved inwardly to be forced inward and radially, whereby the balls may be adjusted to project to a greater or less distance into the bore 5 to engage the valve stem 10 and support the tool at a pointbetween the cutters 3 and 16. By this means as the tool will be properly centered on the valve stem, and the sets of cutters disposed in engagement with the valve and its seatyit is'evident that these surfaces will be cut accurately for a true fitting action, this operation being also secured in cutting either of said surfaces independently.

of the other. .The outer end of the bushing or cone 14 is of angular form, as shown, so that it may be gripped and turned in or out by means of a Wrench or other suitable tool to adjust the balls or centering objects 15 It will of course be evident that the cutters 3 may be adjusted or different cutters employed to suit valves of different sizes, while cutting members 8 having beveled cutters of different diameters may also fit upon the portion 7 of the body, thus rendering the device capable of acting upon valves and valve seats varying to a greater or less extent in size. In the structure shown in Fig. 1, however, the cutter 8 is of a size to adapt the device for insertion and use to cut a valve seat of that kind arranged within a pocket or cage in the engine cylinder, while the valve cutter is arranged to operate upon the valve externally of the pocket. The valve body is provided with angular or flattened surfaces 17 to enable it to be held from rotation when the device is used for cutting the valve alone without simultaneously acting upon the valve seat.

The means for imparting rotary motion to the body 1 comprises a chuck or driver head in the form of a yoke 18 the arms of which extend at diametrically opposite sides of the body 2 and are provided with projecting studs 10 the squared ends of which engage withcorresponding '5' slots 20 formed in the projecting lugs on the body 2 such that motion can be imparted to the body in either direction and such that the chuck or driver head is held in contact with the body 2 under the influence of the pressure exerted through the yoke or indirectly by the reaction of the. cutting pressure exerted by the inner mechanism of the screwdriver attachment hereinafter described.

The attachment of the chuck or driver head to the body 2 is effected by sliding the chuck or driver head transversely across the body the screwdriver bit being meanwhile out of engagement with the valve head.

In practice the chuck or driver .head would be oscillated or alternately turnedo'r rotated in opposite directions or rotated wholly in one direction, said chuck 18 being provided for this purpose with an angular projection 21 adapted to be engaged by a wrench, brace or breast drill.

Provided in the chuck or driver head 18 is a valve engaging member or bit 22 which has an end portion shaped like a screwdriver bit to engage the usual recess provided in the valve head, which bit is provided with a stem 2% projecting through a passage in the center of the chuck yoke and through the boss 21 said stem also extending through an adjusting nut 25 and having an angular outer end for the application of a driving device. The nut 25 has a hollow or chambered receiving disk or bearing member 27 on the bit stem between which and the wall of the head are interposed anti-friction bearings 28 the nut being adjustable w eby the bit may be advanced or alternated to. move its beveled end into and out of engagement with the valve so that the latter may be held with the desired force against the cutters 3.

Normally when operating the chuck or driver head the body, cutter, and valve itself would be revolved or turned and the seating would thereby be operated upon, if therefore the inner spindle or valve engaging bit be held stationary, or rotated in opposite direction to the body, both valve and valve seat would be operated upon simultaneously by reason of the cutters 3 being made with an opposite cutting angle, while by holding the body 2 from rotating by any suitable means enga ing its surfaces 17 and turning or rotating the bit independently by means of its angular end 26, the valve proper may be cut or ground independently of its seat, the cutting devices being properly centered for either of these actions. Furthermore it will seen that the invention provides a device which is also designed to subserve the other functions stated, and perform the object sought, in a simple, reliable and efficient manner.

In Figs. 5 and 6 of the drawings I have shown a modified construction of the tool which embodies in general the features of the tool shown in Figs. 1 to 3 inclusive, and the corresponding parts are similarly designated, but in the form illustrated in Figs. 5 and 6 the valve cutters 3 are disposed wholly upon the interior of the head 2 at a proper working angle and are removably mounted as previously explained, while the seat cutter 8 is keyed to the body 1 as shown at 29, so that cutters of different diameters may be applied and removed. The cutter 8 in this instance is of considerably greater diameter than the body and is designed for use in cutting all sizes of valve seats from the larger size downward and for use where the valve seats are externally exposed seats. A further change in this construction resides in providing the head 2 with recesses 30 to receive locking projections 31 upon a chuck or driver head 32, which is thus rendered engageable with and disengageable from the cutter head 2 at will. As shown, the chuck has an angular projection 21 corresponding to the lug 21 and is axially bored for the reception of a plunger bit 33 which is pressed inward by a spring 3A acting to hold the valve pressed against the cutters 3 \Vith this structure and with the chuck or driver head in position the body, cutters and valve proper are all rotated simultaneously, the actual cutting action being upon the valve seating which is of course stationary. If desired and upon removing the chuck 32 and holding the body from rotating by means of its angular surfaces 17 the valve may be rotated by means of a screwdriver or other implement for an independent cutting action.

In the modified form of my invention shown in Figs. 7 and 8 the structure is similar to that shown in Figs. 5 and 6 and the operation is substantially the same the main differences being in the use of a centering ring or bushing 35 in the place of an adjustable centering device, in the provision of a pressure spring 36 to engage and hold the valve against the valve cutter, the said cutter in this instance consisting of a ring in which are cut the necessary cutting teeth and which is detachable in the manner of the outer cutter 37 and in providing the chuck 38 with pins 39 or screwdriver bit 40 to operate the valve proper and with a Copies of this patent may be obtained for manipulating rod or handle 41 thus providing a simple form of tool for use more particularly in working upon valves and seats of a definite size, and for both valves and valve seats externally exposed, and those of the kind arranged within a pocket or chamber. The mode of operation with this construction will be readily understood from the foregoing description.

I claim 1. A cutting device comprising a tubular body adapted to surround a valve and to be positioned between the valve and its seat, a cutter concentric with and inside the body for engaging the valve face, a conical cutter placed upon and concentric with the body at the outer end to engage the valve seat.

2. A device of the character described comprising a tubular body adapted to sur round a valve, and to be positioned between the valve and its seat, cutting means upon the said body for simultaneously engaging the valve and its seat, a central perforation in the body permitting the end of the valve to extend and project outward from the end of the body and enter the valve guide as a pilot for the body, insuring the correct correlation of the valve, body and seat.

3. A device of the character described comprising a tubular body adapted to surround a valve, cutters upon the body for respectively operating upon the valve and its seat, means for centralizing the valve, and body relative to the seat, and means for ro tating the valve, stem and body for truing the valve seat.

4. A device of the character described comprising a tubular body adapted to surround a valve, cutting devices detachably attached to the said body for respectively acting upon the valve and its seat, means for centralizing the device, an operating device connected with the body for operating on the valve and its seat simultaneously, and means carried by said operating device for engaging the valve 5. A device of the character described comprising a tubular body adapted to surround a valve, cutting means upon the said body, means for centralizing the valve, body and seat, an operating device detachably engaging the body, and means carried by said operating device for engaging the valve whereby the body may be rotated independently of, or with the valve.

In testimony whereof I atliX my signature in presence of two witnesses.

ARTHUR ALBERT BULL.

Witnesses:

V. HUGHES, F. A. HARPER.

five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

